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If a car traveling at 23 m/s is brought to a full stop in 3.8 s after the brakes are applied, find the average acceleration during braking.
790-loop circular armature coil with a diameter of 10.5 cm rotates at 75.0 rev/s in a uniform magnetic field of strength 0.75 T
The resistance of a copper wire is 0.8? at 20 DC. When it is placed in an oven, its resistance is 1.2?. What is the temperature of the oven
What is the minimal mass of helium (density 0.18) needed to lift a balloon carrying two people in a basket, if the total mass of people, basket, and balloon (but not gas) is 320.
a 2 kg ball moving at 3 m/s hits a wall and bounces off. immediately after the collision it moves at 3 m/s in the opposite direction. what is the magnitude of the change in the objects momentum
Energy is to be stored in a flywheel in the shape of a uniform solid disk with a radius of R = 1.30m and a mass of 73.0kg. find the maximum kinetic energy that can be stored in the flywheel
An unknown mass of tin is heated to a temperature of 218 C. It is placed into 200 g of water which is in a 100 g copper cup initially at 10 C. What is the heat lost by the sample of tin
Pulsed lasers used in science and medicine produce very short bursts of electromagnetic energy. how many wavelengths are found within the laser pulse
For a movie scene, a 75kg stuntman drops from a tree onto a 55kg sled that is moving on a frozen lake with a velocity of 15m/s toward the shore. What is the speed of the sled after the stuntman is on board
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, How fast are the waves traveling
A spring loaded gun is used to launch a ping pong ball (mass 4g) at an angle of 50 degrees with the horizontal. how far does the ping pong travel if it is launched from the ground
A beam of laser light (? = 741 nm) hits a black wall and is fully absorbed. what is the total force exerted by the photons on the wall
question1a 43 n toys is placed in a light swing that is attached to ropes 3.5 m long.a discover gravitational potential
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